<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 警告 -->
      <el-alert
        :closable="false"
        show-icon
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择分类的级联 -->
          <el-cascader
            :options="cateList"
            v-model="selectCateKeys"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            @click="addDialogVisible = true"
            type="primary"
            size="small"
            :disabled="isBtnDisabled"
          >
            添加参数
          </el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTabData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template v-slot="scope">
                <div class="nei">
                  <!-- 循环渲染标签 -->
                  <el-tag
                    closable
                    v-for="(item, index) in scope.row.attr_vals"
                    :key="index"
                    @close="handleClosed(index,scope.row)"
                  >
                    {{ item }}
                  </el-tag>
                  <!-- 输入文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                    >+ New Tag</el-button
                  >
                </div>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  size="small"
                  type="primary"
                  icon="el-icon-edit"
                  >编辑</el-button
                >
                <el-button
                  @click="removeParams(scope.row.attr_id)"
                  size="small"
                  type="danger"
                  icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <el-tab-pane label="静态属性" name="only">
          <el-button
            @click="addDialogVisible = true"
            type="primary"
            size="small"
            :disabled="isBtnDisabled"
          >
            添加属性
          </el-button>
          <!-- 静态参数表格 --> 
          <el-table :data="onlyTabData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template v-slot="scope">
                <div class="nei">
                  <!-- 循环渲染标签 -->
                  <el-tag
                    closable
                    v-for="(item, index) in scope.row.attr_vals"
                    :key="index"
                    @close="handleClosed(index,scope.row)"
                  >
                    {{ item }}
                  </el-tag>
                  <!-- 输入文本框 -->
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <!-- 添加按钮 -->
                  <el-button
                    v-else
                    class="button-new-tag"
                    size="small"
                    @click="showInput(scope.row)"
                    >+ New Tag</el-button
                  >
                </div>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  size="small"
                  type="primary"
                  icon="el-icon-edit"
                  >编辑</el-button
                >
                <el-button
                  @click="removeParams(scope.row.attr_id)"
                  size="small"
                  type="danger"
                  icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 公用对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="addFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
import {
  getCateListAjax,
  getTabsDataAjax,
  getAddParamsAjax,
  showEditDialogAjax,
  editParamsAjax,
  getRemoveAjax,
  getPushInputAjax
} from "@/utils/api/goods/params";
export default {
  data() {
    return {
      // 商品分类列表
      cateList: [],
      //   级联选择框配置
      cateProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      // 级联选择框双向绑定到数组
      selectCateKeys: [],
      //   被激活的页签名称
      activeName: "many",
      //  动态数据
      manyTabData: [],
      // 静态数据
      onlyTabData: [],
      //   控制对话框的显示隐藏
      addDialogVisible: false,
      //   添加参数的表单数据对象
      addForm: {},
      // 添加表单的数据对象
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      //   修改对话框的显示隐藏
      editDialogVisible: false,
      // 修改对话框表单数据
      editForm: {},  
    };
  },
  methods: {
    // 获取所有商品分类列表信息
    async getCateList() {
      const { data: res } = await getCateListAjax();
      this.cateList = res.data;
      //   console.log(this.cateList);
    },
    // 级联选择框变化会触发
    handleChange() {
      this.getParamsData();
    },
    // tab 页签点击事件处理函数
    handleTabClick() {
      //   console.log(this.activeName);
      this.getParamsData();
    },
    // 后去参数的列表数据
    async getParamsData() {
      if (this.selectCateKeys.length !== 3) {
        this.manyTabData = []
        this.onlyTabData = []
        this.selectCateKeys = [];
        return;
      }
      // 选中三级
      //   根据所选分类的id 和当前所处的面板获取对应的数据
      const { data: res } = await getTabsDataAjax(this.cateId, this.activeName);

      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 控制文本框输入的值
        item.inputValue = ''
      });

      console.log(res.data);

      if (this.activeName === "many") {
        this.manyTabData = res.data;
      } else {
        this.onlyTabData = res.data;
      }
    },
    // 监听对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    // 点击按钮添加函数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await getAddParamsAjax(this.cateId, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
        });
        this.$message.success("操作成功");
        this.addDialogVisible = false;
        this.getParamsData();
      });
    },
    // 点击按钮展示修改对话框
    async showEditDialog(attr_id) {
      const { data: res } = await showEditDialogAjax(
        attr_id,
        this.cateId,
        this.activeName
      );
      //    console.log(res);
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 点击按钮修改参数信息
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await editParamsAjax(
          this.editForm.attr_id,
          this.cateId,
          this.editForm.attr_name,
          this.activeName
        );
        this.$message.success("修改成功");
        this.getParamsData();
        this.editDialogVisible = false;
      });
    },
    // 重置修改的表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 根据id删除参数项
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该参数, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      console.log(confirmResult);

      // 用户取消了删除的操作
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除！");
      }
      // 删除的请求
      getRemoveAjax(this.cateId, attr_id);
      this.$message.success("操作成功！");
      this.getParamsData();
    },
    // 文本框失去焦点 或按下了enter
    handleInputConfirm(row){
        if(row.inputValue.trim().length === 0){
            row.inputValue = ''
            row.inputVisible = false
            return
        }
        // 用户输入了内容 
        row.attr_vals.push(row.inputValue.trim())
        row.inputValue = ''
        row.inputVisible = false
        this.saveAttrVals(row)
    },
    // 点击按钮 展示文本输入框
    showInput(row){
        row.inputVisible = true
        // 让文本框自动获得焦点
        // $nextTick 方法的调用，就是当页面上的元素被重新渲染之后，才会执行回调函数中的代码
        this.$nextTick(_ => {
            this.$refs.saveTagInput.$refs.input.focus();
        })
    },
    // 删除对应的参数
    handleClosed(i,row){
        row.attr_vals.splice(i,1)
        this.saveAttrVals(row)
    },
    // 将对attr_vals 的操作保存到数据可 
    saveAttrVals(row){
        // 需要发起请求保存操作
        getPushInputAjax(this.cateId,row.attr_id,{
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(' ')
        });
        this.$message.success('操作参数项成功！')
    }
  },
  computed: {
    // 如果按钮需要被禁用 返回true 反之返回false
    isBtnDisabled() {
      return this.selectCateKeys.length === 3 ? false : true;
    },
    //  当前选中的三级分类id
    cateId() {
      if (this.selectCateKeys.length === 3) {
        return this.selectCateKeys[2];
      }
      return numll;
    },
    // 动态计算标题文本
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      }
      return "静态属性";
    },
  },
  created() {
    this.getCateList();
  },
};
</script>
<style lang='less' scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.nei {
  margin: 0 30px;
}
.input-new-tag{
    width: 120px;
}
</style>